<script setup lang="ts">
import axios from 'axios'
import { QuillEditor } from '@vueup/vue-quill'
import '@vueup/vue-quill/dist/vue-quill.snow.css'
import storage from '@/utils/storage'

const quillEditorRef = useTemplateRef('quillEditorRef')
const uploadUrl = ref(import.meta.env.VITE_API_URL + '/common/upload') // 上传的图片服务器地址
const headers = ref({
	Authorization: 'Bearer ' + storage.get('token')
})

const emits = defineEmits<{
	'update:modelValue': [v: string]
}>()

const props = defineProps({
	/* 编辑器的内容 */
	modelValue: {
		type: String,
		default: ''
	},
	/* 高度 */
	height: {
		type: Number,
		default: null
	},
	/* 最小高度 */
	minHeight: {
		type: Number,
		default: null
	},
	/* 只读 */
	readOnly: {
		type: Boolean,
		default: false
	},
	/* 上传文件大小限制(MB) */
	fileSize: {
		type: Number,
		default: 5
	},
	/* 类型（base64格式、url格式） */
	type: {
		type: String,
		default: 'url'
	}
})

const options = ref({
	theme: 'snow',
	bounds: document.body,
	debug: 'warn',
	modules: {
		// 工具栏配置
		toolbar: [
			['bold', 'italic', 'underline', 'strike'], // 加粗 斜体 下划线 删除线
			['blockquote', 'code-block'], // 引用  代码块
			[{ list: 'ordered' }, { list: 'bullet' }], // 有序、无序列表
			[{ indent: '-1' }, { indent: '+1' }], // 缩进
			[{ size: ['small', false, 'large', 'huge'] }], // 字体大小
			[{ header: [1, 2, 3, 4, 5, 6, false] }], // 标题
			[{ color: [] }, { background: [] }], // 字体颜色、字体背景颜色
			[{ align: [] }], // 对齐方式
			['clean'], // 清除文本格式
			['link', 'image', 'video'] // 链接、图片、视频
		]
	},
	placeholder: '请输入内容',
	readOnly: props.readOnly
})

const styles = computed(() => {
	let style = {
		minHeight: '',
		height: ''
	}
	if (props.minHeight) {
		style.minHeight = `${props.minHeight}px`
	}
	if (props.height) {
		style.height = `${props.height}px`
	}
	return style
})

const content = ref('')
watch(
	() => props.modelValue,
	v => {
		if (v !== content.value) {
			content.value = v === undefined ? '<p></p>' : v
			content.value = v === '' ? '<p></p>' : v
		}
	},
	{ immediate: true }
)

const uploadRef = ref<null | HTMLElement>(null)

// 如果设置了上传地址则自定义图片上传事件
onMounted(() => {
	if (props.type === 'url') {
		let quill = quillEditorRef.value!.getQuill()
		let toolbar = quill.getModule('toolbar')
		toolbar.addHandler('image', (value: any) => {
			if (value) {
				uploadRef.value?.click()
			} else {
				quill.format('image', false)
			}
		})
		quill.root.addEventListener('paste', handlePasteCapture, true)
	}
})

// 上传前校检格式和大小
function handleBeforeUpload(file: File) {
	const type = ['image/jpeg', 'image/jpg', 'image/png', 'image/svg']
	const isJPG = type.includes(file.type)
	//检验文件格式
	if (!isJPG) {
		ElMessage.error('图片格式错误!')
		return false
	}
	// 校检文件大小
	if (props.fileSize) {
		const isLt = file.size / 1024 / 1024 < props.fileSize
		if (!isLt) {
			ElMessage.error(`上传文件大小不能超过 ${props.fileSize} MB!`)
			return false
		}
	}
	return true
}

// 上传成功处理
function handleUploadSuccess(res: any) {
	// 如果上传成功
	if (res.code === 200) {
		// 获取富文本实例
		let quill = toRaw(quillEditorRef.value!).getQuill()
		// 获取光标位置
		let length = quill.selection.savedRange.index
		// 插入图片，res.url为服务器返回的图片链接地址
		quill.insertEmbed(length, 'image', import.meta.env.VITE_API_URL + res.fileName)
		// 调整光标到最后
		quill.setSelection(length + 1)
	} else {
		ElMessage.error(`图片插入失败`)
	}
}

// 上传失败处理
function handleUploadError() {
	ElMessage.error(`图片插入失败`)
}

// 复制粘贴图片处理
function handlePasteCapture(e: ClipboardEvent) {
	const clipboard = e.clipboardData // || window.clipboardData
	if (clipboard && clipboard.items) {
		for (let i = 0; i < clipboard.items.length; i++) {
			const item = clipboard.items[i]
			if (item.type.indexOf('image') !== -1) {
				e.preventDefault()
				const file = item.getAsFile()
				if (file) {
					insertImage(file)
				}
			}
		}
	}
}

function insertImage(file: File) {
	const formData = new FormData()
	formData.append('file', file)
	axios
		.post(uploadUrl.value, formData, {
			headers: {
				'Content-Type': 'multipart/form-data',
				Authorization: headers.value.Authorization
			}
		})
		.then(res => {
			handleUploadSuccess(res.data)
		})
}
</script>

<template>
	<div>
		<el-upload
			v-if="type == 'url'"
			:action="uploadUrl"
			:before-upload="handleBeforeUpload"
			:on-success="handleUploadSuccess"
			:on-error="handleUploadError"
			name="file"
			:show-file-list="false"
			:headers="headers"
			class="editor-img-uploader"
		>
			<i
				ref="uploadRef"
				class="editor-img-uploader"
			/>
		</el-upload>
	</div>
	<div class="editor">
		<QuillEditor
			ref="quillEditorRef"
			v-model:content="content"
			content-type="html"
			:options="options"
			:style="styles"
			@textChange="e => emits('update:modelValue', content)"
		/>
	</div>
</template>

<style>
.editor-img-uploader {
	display: none;
}
.editor,
.ql-toolbar {
	line-height: normal !important;
	white-space: pre-wrap !important;
}
.quill-img {
	display: none;
}
.ql-snow .ql-tooltip[data-mode='link']::before {
	content: '请输入链接地址:';
}
.ql-snow .ql-tooltip.ql-editing a.ql-action::after {
	padding-right: 0;
	content: '保存';
	border-right: 0;
}
.ql-snow .ql-tooltip[data-mode='video']::before {
	content: '请输入视频地址:';
}
.ql-snow .ql-picker.ql-size .ql-picker-label::before,
.ql-snow .ql-picker.ql-size .ql-picker-item::before {
	content: '14px';
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value='small']::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value='small']::before {
	content: '10px';
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value='large']::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value='large']::before {
	content: '18px';
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value='huge']::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value='huge']::before {
	content: '32px';
}
.ql-snow .ql-picker.ql-header .ql-picker-label::before,
.ql-snow .ql-picker.ql-header .ql-picker-item::before {
	content: '文本';
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='1']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='1']::before {
	content: '标题1';
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='2']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='2']::before {
	content: '标题2';
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='3']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='3']::before {
	content: '标题3';
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='4']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='4']::before {
	content: '标题4';
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='5']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='5']::before {
	content: '标题5';
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='6']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='6']::before {
	content: '标题6';
}
.ql-snow .ql-picker.ql-font .ql-picker-label::before,
.ql-snow .ql-picker.ql-font .ql-picker-item::before {
	content: '标准字体';
}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value='serif']::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value='serif']::before {
	content: '衬线字体';
}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value='monospace']::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value='monospace']::before {
	content: '等宽字体';
}
</style>
